Question 1

Which of the following is a quantitative observation?

Accepted Answer

The temperature increased by $$5.0\ ^\circ\mathrm{C}.$$

Question 2

A measurement consists of which two essential parts?

Accepted Answer

Number and unit

Question 3

Which of the following SI base units is correctly matched with its physical quantity?

Accepted Answer

Meter - Length

Question 4

A patient’s body temperature is measured as $$39.0\ ^\circ\mathrm{C}. $$What is this temperature in kelvin?

Accepted Answer

$$312.15\ \mathrm{K}$$

Question 5

Which metric prefix corresponds to a multiplier of $$10^{-9}$$?

Accepted Answer

nano

Question 6

How many significant figures are in the measurement $$0.00430\ \mathrm{g}$$?

Accepted Answer

3

Question 7

Which of the following numbers has four significant figures?

Accepted Answer

3204

Question 8

When multiplying $$56\ \mathrm{cm} 	imes 4\ \mathrm{cm}$$, how many significant figures should the answer have?

Accepted Answer

1

Question 9

A student adds $$23.46\ \mathrm{g}$$ and $$31.1\ \mathrm{g}. $$What is the correct answer, reported to the proper number of decimal places?

Accepted Answer

$$54.6\ \mathrm{g}$$

Question 10

Which of the following is an example of an exact value?

Accepted Answer

$$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$

Question 11

A sample of mercury has a volume of $$95\ \mathrm{mL}. If $$the density of mercury is $$13.6\ \mathrm{g/cm^3$}$$, what is its mass in grams?

Accepted Answer

$$1292\ \mathrm{g}$$

Question 12

Which property is intensive and does NOT depend on the amount of substance?

Accepted Answer

Density

Question 13

Convert $$2.00\ \mathrm{ft} to $$centimeters using dimensional analysis. ($$1\ \mathrm{ft} = 12\ \mathrm{in}$$, $$1\ \mathrm{in} = 2.54\ \mathrm{cm})$$

Accepted Answer

$$61.0\ \mathrm{cm}$$

Question 14

Which of the following conversion factors is set up correctly to convert from inches to centimeters?

Accepted Answer

$$\frac{2.54\ \mathrm{cm}}{1\ \mathrm{in}}$$

Question 15

A student measures the mass of a sample as $$0.007590\ \mathrm{g}. $$How many significant figures does this measurement have?

Accepted Answer

5

Question 16

Which of the following statements about significant figures is TRUE?

Accepted Answer

Trailing zeros are only significant if there is a decimal point.

Question 17

A scientist records a measurement as $$45.00\ \mathrm{g}. $$How many significant figures does this value have?

Accepted Answer

4

Question 18

Which of the following is the correct equation to convert Celsius to Fahrenheit?

Accepted Answer

$$^\circ\mathrm{F} = 1.8(^\circ\mathrm{C}) + 32$$

Question 19

Which of the following is a correct statement about dimensional analysis?

Accepted Answer

Conversion factors should be arranged so the starting unit is on the bottom.

Essentials of Units, Measurements, and Problem Solving in General Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard